The headline-grabbing feature on Samsung’s latest Galaxy phone is eye-tracking. But what is the feature really good for?

The front-facing camera on the new Galaxy S4 launched last night uses eye tracking to allow for “smart pauses”. Users watching a video on their new phone will find the video automatically pauses if it detects that the user’s eyes have moved from the screen.

But it’s more head-tracking than true “gaze tracking” says Henrik Eskilsson CEO and Founder of Swedish startup Tobii that pioneers the use of eye-tracking software.

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Tech Europe covers Europe’s technology leaders, their companies, and the people and industries that support them — and their ideas. The blog is edited by Ben Rooney, with contributions from The Wall Street Journal and Dow Jones Newswires.